Hi All,

I have a Hangar-9 P51 Miss America Mustang with a Thunder Tiger .65 mounted inverted. I broke in the Thunder Tiger engine a couple of weeks ago and went to fly it today. It starts up easier with the plane inverted and idles and transitions great. It had been running fine when putting the plane upright during break in and now it runs for about 20 seconds and stops quickly after turning it upright. There are no bubbles in the fuel line and it will start upright once it has been run and is warm. However, it will not stay running upright. I have the fuel tank as far forward as possible and can not lower the tank any further in the fuse. Any thoughts or suggestions would be welcome. The centerline of the tank is close to the level of the spray bar on the carb, but still no luck.


Thank you for your help,

Tom